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»Forums Index »IQFeed Developer »IQFeed Developer Support »Dynamic field set
Author Topic: Dynamic field set (2 messages, Page 1 of 1)

bgpl
-Interested User-
Posts: 1
Joined: Dec 21, 2010


Posted: Dec 21, 2010 02:01 AM          Msg. 1 of 2
Basic question regarding dynamic fieldsets:

if i request data for a few fields using the dynamic field capability, will i get update messages containing ONLY those fields ? Or will I get update messages with ALL fields, but only when changes in my requested fields occur ?

thanks !

DTN Brian Wood
-Interested User-
Posts: 17
Joined: Jun 2, 2004


Posted: Dec 21, 2010 02:32 PM          Msg. 2 of 2
For fieldsets, you will receive an update message any time one of the selected fields are directly updated or anytime one of the fields that a selected field depends upon is updated. For example: if you are watching the Change field and the Last price is updated (causing the Change field to be updated), you will still receive an update message. Additionally, "updated" in this paragraph does not mean that the value changed but rather simply that it has been received. This means that you can possibly receive messages that are exactly the same as the previous message received for a symbol. Exceptions to this rule are identified as follows: Decimal Precision - Updates to this field will only result in an update sent to your app if it changes. Tick - Updates to this field only triggers a new update message on trades.

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